Definitions. For the purpose of this Part 2, unless
it is plainly evident from the context that a different meaning is
intended, certain terms used herein are defined as follows:
AIR GAP SEPARATION
A physical break between a supply pipe and a receiving vessel.
The air gap shall be at least double the diameter of the supply pipe,
measured vertically above the rim of the vessel, and in no case less
than one inch.
APPROVED DOUBLE-CHECK VALVE ASSEMBLY
An assembly of at least two independently acting approved
single-check valves including tightly closing shutoff valves on each
side of the check valve assembly and suitable test cocks plus connections
available for testing the watertightness of each valve.
APPROVED REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION DEVICE
(RPZ)
A device incorporating two or more single-check valves and
an automatically operating differential relief valve located between
the two checks, two shutoff valves and equipped with necessary appurtenances
for testing. The device shall operate to maintain the pressure in
the zone between the two check valves, less than the pressure on the
public water supply side of the device. At cessation of normal flow,
the pressure between the check valves shall be less than the supply
pressure. In case of leakage of either check valve, the differential
relief valve shall operate to maintain this reduced pressure by discharging
to the atmosphere. When the inlet pressure is two pounds per square
inch or less, the relief valve shall open to the atmosphere, thereby
providing an air gap in the device. To be approved, these devices
must be readily accessible to maintenance and testing and installed
in a location where no part of the device will be submerged.
APPROVED SINGLE-CHECK VALVE
A check valve that seats readily and completely. It must
be carefully machined to have free moving parts and assured water
tightness. The face of the closure element and valve seat must be
bronze, composition or other noncorrodible material which will seat
tightly under all prevailing conditions of field use. Pins and bushing
shall be of bronze or other noncorrodible, nonsticking material, machined
for easy, dependable operation. The closure element (e.g., clapper)
shall be internally weighted or otherwise internally equipped to promote
rapid and positive closure in all sizes where this feature is obtainable.
APPROVED WATER SUPPLY
Any water supply approved by or under the public health supervision
of a public health agency of the State of New York, the County of
Albany or the City of Watervliet. In determining what constitutes
an approved water supply, the Department of Public Health of the State
of New York (herein called "State Health Department") shall have the
final judgment as to its safety and potability.
BACKFLOW
A flow condition induced by a differential in pressure that
causes the flow of water or other liquids and/or gases into the distribution
pipes of a public water supply from any source other than its intended
source.
CITY
The City of Watervliet.
CITY WATER SUPPLY
An approved water supply sold and delivered to consumers'
premises through the water distribution system of the City of Watervliet.
CONSUMER
Any person to whom water is sold and/or furnished by the
City of Watervliet.
CONTAMINATION
An impairment of the quality of the City water supply by
the presence of any foreign substance (organic, inorganic, radiological
or biological) to a degree which creates a hazard to the public health.
COUNTY HEALTH OFFICER
The Albany County Health officer, his assistants or authorized
deputies acting as, or any other person appointed as, Health Officer
of the County of Albany.
CROSS-CONNECTION
Any unprotected connection between any part of the City water
works system used or intended to supply water for drinking purposes
and any source or system containing water or substance that is not
or cannot be approved as safe, wholesome and potable for human consumption.
NONTOXIC SUBSTANCE
Any substance of a nonpoisonous nature that may create a
moderate or minor hazard to the water supply system.
PERSON
Any natural person, firm, association, organization, partnership,
trust or association of persons, joint venture, corporation or company,
and includes the United States, the State of New York, the County
of Albany, any special purpose district and any officer or agent thereof.
PREMISES
Integrated land area including improvements thereon undivided
by public thoroughfares or water distribution mains of the City of
Watervliet and where all parts of the premises are operated under
the same management and for the same purpose.
PROTECTIVE DEVICE
Any of the following devices:
(2)
Approved reduced pressure principle backflow
prevention device (RPZ).
(3)
Approved double-check valve assembly.
(4)
Approved single-check valve.
SERVICE CONNECTION
The line servicing a premises beginning at the connection
at the City main. No unprotected takeoffs from the service line ahead
of any meter or backflow protective device located at the point of
delivery to the consumer shall be permitted.
TOXIC SUBSTANCE
Any substance (liquid, solid or gaseous), including raw sewage
and lethal substances, that when introduced into the water supply
system creates or may create a danger to the health and well-being
of the consumer.